package com.hch.interceptor;

//登录过滤

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor extends HandlerInterceptorAdapter {

    //利用拦截器对未登录请求进行拦截
    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,
                             Object handler) throws Exception {
        if (request.getSession().getAttribute("user") == null){
            //检测到未登录的情况下重定向到登录页面
            response.sendRedirect("/admin");
            return false;
        }
        return true;
    }
}
